US Bridges

Union Road over Mudddy Run

Good

Hunterdon County, New Jersey · 0.2MI N Barbertn Pt Br RD · Structure no. 1000080

Built
1920
105 years old, rebuilt 2016
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
143
2023 count
Owner
County
County Highway Agency

About this bridge

Union Road over Mudddy Run is a steel stringer/multi-beam or girder carrying Union Road over Mudddy Run in Hunterdon County, New Jersey. It was built in 1920 and reconstructed in 2016, so it is 105 years old, older than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 143 vehicles a day, roughly 3% of them trucks, projected to reach 173 by 2043. The structure is 30 ft (9.1 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesUnion Road
CrossesMudddy Run
Location0.2MI N Barbertn Pt Br RD
RouteCity Street 0
CountyHunterdon County
StateNew Jersey
Coordinates40.49127, -74.99976
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating71 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 20
Structure length30 ft (9.1 m)
Longest span28 ft (8.5 m)
Deck width18 ft (5.6 m)
Roadway width18 ft (5.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143 (2023)
Projected traffic173 by 2043
Trucks3%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$202,000 (2023 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Union Road over Mudddy Run built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2016.

What condition is Union Road over Mudddy Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2023.

How much traffic does Union Road over Mudddy Run carry?

About 143 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Union Road over Mudddy Run?

The structure is 30 ft (9.1 m) long with a longest span of 28 ft (8.5 m) and a deck 18 ft wide.

Who owns Union Road over Mudddy Run?

It is owned by the County Highway Agency.